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Abstract It allows detection of important but clinically silent problems such as lung cancer and suspicious pulmonary nodules. CCTA implies a non-negligible probability to diagnose a previously unknown cancer, which can be compared with that observed in recent CT trials for lung cancer screening, ranging from 0.3% to 2.7%, depending on population characteristics such as age, sex, and smoking history. The frequency of the incidental finding of pulmonary nodules in MDCT was reported to range from 5% to 20%. The detection of additional significant findings with wide FOV reconstruction cardiac CT may lead to earlier treatment for serious disease but may also result in unnecessary, costly, and occasionally harmful evaluations for findings that prove ultimately to be benign So Larger studies with large number of patients and longer time of follow up with histopathological verification of findings are clearly necessary to determine if the cost-benefit equation favors a full or more restricted FOV. The radiation exposure associated with CAC scans has been significantly reduced where it ranges from 0.9 to 2.4 mSv with prospective multislice CT so we recommend reconstruction of the raw data of small field of view of CCTA and also performing the thoracic low dose non contrast scan during CaS to involve the whole chest. |